How old are your children? Have you booked early or late seating?
As we always book late seating we rarely see young children at the tables because 8
m is usually too late for them to eat. Consequently we have never seen children with crayons or colouring books and I don't think HAL has placemats, like they do in restaurants for children to colour.
We have seen older children with video games which keeps them occupied.
If your children are old enough for Club HAL, why not feed them early in the Lido, then they can go to Club HAL and you can have a nice peaceful dinner in the dining room.